I have a 06', crew cab, Alli' automatic,4x4 Dmax....looking for new shocks. I dont off road and occasionally haul a 2100# truck camper in the box, however I have Firestone air bags when I haul the TC. Recommendations for shocks? Rancho 5000? Bilsteins? front and rear. I run LTX Michelins one size up from stock.